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　　例句：

　　A further piece of research//cited by the authors//involved undergraduates//who were shown photos of 50 chief executives from the Fortune 1000 list of big firms.

　　【主干】

　　A further piece of research involved undergraduates

　　【修饰成分】

　　who were shown photos of 50 chief executives from the Fortune 1000 list of big firms是定语从句，修饰undergraduates。cited by the authors为过去分词短语作后置定语，修饰前面的research，识别可以用：N+V-ed短语，动词和名词之间构成被动关系，V-ed短语则为后置定语。

　　【翻译】

　　作者提到了另外一项研究，该研究向大学生们展示了来自美国《财富》1000强企业中50位总裁的照片。

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